Intercalation of organic molecules in layered copper (II) nitroprusside

H. OSIRY; A. CANO; A. A. LEMUS-SANTANA; A. RODRÍGUEZ; R. E. CARBONIO; E. REGUERA

JOURNAL OF SOLID STATE CHEMISTRY

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2015 vol. 230 p. 374 - 380

0022-4596

This contribution discusses the intercalation of imidazoleand its 2-ethyl derivative, and pyridine in 2D copper nitroprusside. In the interlayerregion, neighboring molecules remain interacting through their dipole and quadrupolemoments, which supports the solid 3D crystal structure. The crystal structure ofthis series of intercalation compounds was solved and refined from powder X-raydiffraction patterns complemented with spectroscopic information. The intermolecular interactions were studied from the refined crystal structures and low temperature magnetic measurements. Due to strong attractive forces between neighboring molecules, the resulting π-π cloud overlapping enables the ferromagnetic coupling between metal centers on neighboring layers, which was actually observed for the solids containing imidazole and pyridine as intercalated molecules. For these two solids, the magnetic data were properly described with a model of six neighbors. For the solid containing 2-ethylimidazole and for 2D copper nitroprusside, a model of four neighbors in a plane is sufficient to obtain a reliable data fitting.